Frost dates in Grundy County, Illinois
The average last spring frost in Grundy County falls Apr 16 to Apr 27 and the average first fall frost Oct 15 to Oct 26, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 5b. Places: Braceville, Coal City, Gardner, Kinsman, Mazon, Morris. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 60407 | Braceville | Apr 16 | Oct 26 | 5b |
| 60416 | Coal City | Apr 16 | Oct 26 | 5b |
| 60424 | Gardner | Apr 27 | Oct 15 | 5b |
| 60437 | Kinsman | Apr 27 | Oct 15 | 5b |
| 60444 | Mazon | Apr 20 | Oct 23 | 5b |
| 60450 | Morris | Apr 20 | Oct 23 | 5b |
| 60474 | South Wilmington | Apr 27 | Oct 15 | 5b |
| 60479 | Verona | Apr 27 | Oct 15 | 5b |
Nearby counties
Livingston County Kankakee County Will County Kendall County LaSalle County Ford County
All Illinois counties · Download Illinois frost dates (CSV)
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